Monitor camera

Abstract

To prevent wide-angle and narrow-angle lenses from coming into contact with a dome cover.SOLUTION: A monitor camera includes a first infrared radiation unit that radiates first infrared light, a second infrared radiation unit that radiates second infrared light having a radiation angle narrower than that of the first infrared light, an imaging lens into which light from at least one of the radiation areas of the first infrared light and the second infrared light is incident, a camera unit body that is rotatable around a tilt axis, and a dome cover that covers the camera unit body. The first infrared radiation unit has a first light source of the first infrared light and a first base on which the first light source is placed, and the second infrared radiation unit has a second light source of the second infrared light and a second base on which the second light source is placed, and arrangements of the first light source and the second light source provided so as to sandwich the camera unit body from the left and right direction differ in the up and down direction.SELECTED DRAWING: Figure 8A

Description

[Technical field]

[0001] The present disclosure relates to surveillance cameras. [Background technology]

[0002] Patent Document 1 discloses a low-illuminance camera that obtains high visibility with low power consumption for imaging locations that provide high visibility under illumination with strong light emission intensity in a low-illuminance environment for vehicle interior monitoring. This low-illuminance camera includes a wide-angle lens, a camera unit, and a lighting unit having a wide-angle LED and a narrow-angle LED. The wide-angle LED and narrow-angle LED of the lighting unit both have the same light emission intensity, but the emission lenses arranged on the light emission surfaces of the LEDs are different. Therefore, a wide-angle LED that uses an emission lens with a wide emission angle has low emission intensity and a short irradiation distance. On the other hand, a narrow-angle LED that uses an emission lens with a narrow emission angle has high emission intensity and a long irradiation distance. In this low-illuminance camera, a structure is disclosed in which the wide-angle LED and narrow-angle LED are arranged side by side in the left-right direction relative to the wide-angle lens. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2012-5054 A Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, even in outdoor surveillance cameras in which the imaging unit and emission lens are covered with a camera housing and a dome cover, a wide-angle lens may be provided on one side of the pedestals arranged on either side of the imaging unit inside the camera housing, and a narrow-angle lens on the other side. However, because the wide-angle lens and the narrow-angle lens have different heights and sizes, if the wide-angle lens and the narrow-angle lens are arranged on pedestals that are at the same height relative to the imaging unit, there is a possibility that the wide-angle lens or the narrow-angle lens will interfere with the dome cover.

[0005] The present disclosure has been devised in consideration of the above-mentioned conventional circumstances, and aims to provide a surveillance camera that can prevent interference between a dome cover and a wide-angle lens or a narrow-angle lens. [Means for solving the problem]

[0006] The present disclosure provides a surveillance camera having a first infrared irradiation unit that irradiates first infrared light, a second infrared irradiation unit that irradiates second infrared light having an irradiation angle narrower than the first infrared light, and an imaging lens into which light from at least one of the irradiation areas of the first infrared light and the second infrared light is incident, the surveillance camera comprising: a camera unit body; and a dome cover that covers the camera unit body, the first infrared irradiation unit having a first light source of the first infrared light and a first base on which the first light source is placed, the second infrared irradiation unit having a second light source of the second infrared light and a second base on which the second light source is placed, the first light source and the second light source being positioned on either side of the camera unit body in the left-right direction, and the positioning of the first light source and the second light source differs in the up-down direction. Effect of the Invention

[0007] According to the present disclosure, interference between the dome cover and the wide-angle lens or narrow-angle lens can be prevented. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a front view of a surveillance camera according to a first embodiment; [Diagram 2] A perspective view of the camera body [Diagram 3] Bottom view of the camera body shown in FIG. [Figure 4] Schematic diagram illustrating the arrangement of each lens on each base. [Diagram 5] Schematic diagram showing a modified example of lens arrangement [Figure 6] A front view of the camera body shown in FIG. [Figure 7] Schematic diagram showing the difference in the left and right pedestal positions [Figure 8A] FIG. 4 is a diagram showing an example of a cross section taken along the line AA in FIG. [Figure 8B] FIG. 4 is a diagram showing another example of the AA cross section of FIG. 3. [Figure 9] A perspective view of the camera unit body with the wide-angle and narrow-angle brackets attached, seen from the front [Figure 10] A perspective view of the camera unit body with the wide-angle and narrow-angle brackets attached, seen from the rear [Figure 11] Right side view of the camera unit with the narrow-angle bracket attached [Figure 12] A perspective view of the right side of the narrow-angle bracket, seen from diagonally behind [Figure 13] A perspective view of the narrow-angle bracket from the front, diagonally downward. [Figure 14] An enlarged view of part B in Figure 11, seen from a downward angle. [Figure 15] Cross section CC of Figure 14 [Figure 16] Cross-sectional view of Fig. 11 [Figure 17] EE cross section of Figure 11 [Figure 18] Left side view of the camera unit with the wide-angle bracket attached [Figure 19] A perspective view of the left side of the wide-angle bracket, seen from diagonally behind [Figure 20] A perspective view of the front of the wide-angle bracket, seen from diagonally below and in front [Figure 21] Cross section G shown in Figure 18 [Figure 22] Schematic diagram showing a configuration according to Comparative Example 1, in which a wide-angle lens and a narrow-angle lens are symmetrically arranged on the left and right LED bases, viewed from the front. [Figure 23] Schematic diagram showing a configuration according to Comparative Example 2 in which a wide-angle lens, a narrow-angle lens, and an intermediate lens are symmetrically arranged on the left and right LED bases, as viewed from below. [Figure 24] Schematic diagram showing a configuration according to Comparative Example 3 in which a wide-angle lens, a narrow-angle lens, and an intermediate lens are symmetrically arranged on one LED base, as viewed from below. [Diagram 25] FIG. 13 is a schematic diagram showing a further modified example of the lens arrangement. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, with reference to the drawings as appropriate, an embodiment specifically disclosing a surveillance camera according to the present disclosure will be described in detail. However, more detailed explanation than necessary may be omitted. For example, detailed explanations of already well-known matters or duplicate explanations of substantially identical configurations may be omitted by assigning the same reference numerals. This is to avoid the following explanation becoming unnecessarily redundant and to facilitate understanding by those skilled in the art. Note that the attached drawings and the following explanation are provided to enable those skilled in the art to fully understand the present disclosure, and are not intended to limit the subject matter described in the claims.

[0010] Fig. 1 is an external front view of a surveillance camera 11 according to the first embodiment. Surveillance camera 11 has a bracket 15 fixed to a support pipe 13 or the like, and a main housing 17 equipped with a camera unit main body 33 (see Fig. 2) and supported by being suspended from bracket 15. Main housing 17 has a rotating base 19 fixed in a suspended state from bracket 15, and a camera housing 21 supported in a suspended state so as to be rotatable relative to rotating base 19. Camera housing 21 is supported relative to rotating base 19 so as to be rotatable about pan axis 23. Pan axis 23 is an imaginary axis line along the vertical direction.

[0011] The surveillance camera 11 also includes a dome cover 25 fixed to the camera housing 21. The dome cover 25 has a central imaging window portion 27 and left and right light projection window portions 29 that sandwich the imaging window portion 27. The imaging window portion 27 and the light projection window portion 29 are connected by a connector 31.

[0012] The support pipe 13 is fixed to, for example, a ceiling, a wall, a pole, or the like. The bracket 15 is formed, for example, in a conical shape. Alternatively, the bracket 15 may have a locking structure on its underside (i.e., on the main housing 17 side) for locking to the rotating base 19, and may be a support metal fitting fixed to a pole, a wall, or the like. The rotating base 19 supported by the bracket 15 has a cylindrical outer shape approximately equal to the diameter of the bottom surface of the conical part of the bracket 15.

[0013] 2 is a perspective view of the camera unit body 33. The camera housing 21 (see FIG. 1) accommodates the camera unit body 33. The camera unit body 33 includes an imaging lens 35 into which light from an irradiation region of at least one of a first infrared light (see below) and a second infrared light (see below) is incident, and is supported by the camera housing 21 so as to be rotatable about a tilt axis 37. The tilt axis 37 is a virtual axis line perpendicular to the pan axis 23 (see FIG. 1). The camera unit body 33 is supported by the camera housing 21 (see FIG. 1) so as to be rotatable about the tilt axis 37 as a rotation center.

[0014] In addition, the directions in this specification are according to the directions of the arrows attached to the X-axis, Y-axis, and Z-axis shown in each figure. Here, the X direction indicates the right direction, the Y direction indicates the forward direction, and the Z direction indicates the downward direction. Therefore, although not shown in the figures, the -X direction is the left direction, the -Y direction is the backward direction, and the -Z direction is the upward direction. In addition, the circle surrounding the point attached to the intersection of the orthogonal axes indicates the direction in which the arrow extends toward the front side of the paper, and the circle surrounding the X attached to the intersection of the orthogonal axes indicates the direction in which the arrow extends toward the rear side of the paper. In addition, in the following description, the direction along the lens center axis 39 of the camera unit main body 33 is the up-down direction.

[0015] The camera section main body 33 has at least a camera cover 41 having a substantially cylindrical (barrel-shaped) shape obtained by cutting a spherical surface (in other words, a sphere) at a pair of parallel surfaces sandwiching the center of the sphere, and a camera unit main body 43 whose central portion is covered by the camera cover 41. The camera cover 41 is configured by combining a rear cover 45 and a front cover 47, which are divided into upper and lower parts by a surface perpendicular to the lens central axis 39. The front cover 47 is formed with an imaging lens opening 49 that exposes the imaging lens 35. The imaging lens 35 exposed in the imaging lens opening 49 is disposed in the imaging window portion 27, so that imaging light from a subject (in other words, light from at least one of the irradiation areas of the first infrared light (see below) and the second infrared light (see below)) can be incident thereon.

[0016] A wide-angle side bracket 83 (see Figs. 8A and 8B) and a narrow-angle side bracket 79 (see Figs. 8A and 8B), which will be described later, are fixed to the camera unit body 43. A driven shaft 51 (see Figs. 8A and 8B), whose axis is the tilt shaft 37, protrudes to the left from the wide-angle side bracket 83. A main shaft 53, whose axis is the tilt shaft 37, protrudes to the right from the narrow-angle side bracket 79. The main shaft 53 and driven shaft 51 are rotatably supported by bearings (not shown) provided in the camera housing 21, thereby allowing the camera unit body 33 to tilt.

[0017] The camera unit body 33 has a first LED pedestal 55 protruding from the left side of the camera cover 41 and a second LED pedestal 57 protruding from the right side of the camera cover 41. The first LED pedestal 55 is an example of a first pedestal. The second LED pedestal 57 is an example of a second pedestal. The first LED pedestal 55 is formed on the wide-angle side metal fitting 83 (see FIG. 8A and FIG. 8B). The second LED pedestal 57 is formed on the narrow-angle side metal fitting (see FIG. 8A and FIG. 8B). The first LED pedestal 55 is provided with two wide-angle illuminators 59 and one mid-distance illuminator 61. The two wide-angle illuminators 59 are an example of a first infrared irradiator. The second LED pedestal 57 is provided with two narrow-angle illuminators 63 and one mid-distance illuminator 61. The two narrow-angle illuminators 63 are an example of a second infrared irradiator. The first LED base 55 is disposed opposite one of the light projection windows 29. The second LED base 57 is disposed opposite the other of the light projection windows 29. This allows light from the LEDs disposed in the respective LED bases to be irradiated toward the subject through the light projection window 29. An LED (Light Emission Diode) is an example of each of the first light source and the second light source.

[0018] FIG. 3 is a bottom view of the camera unit main body 33 shown in FIG. 2. In the camera unit main body 33, three LEDs that emit infrared light for nighttime photography and the like are arranged on the first LED base 55 and three LEDs on the second LED base 57. On the first LED base 55, two wide-angle lenses 65 are arranged corresponding to two of the three LEDs, and one intermediate lens 67 is arranged corresponding to the remaining LED of the three LEDs and illuminates a subject at a medium distance. On the second LED base 57, two narrow-angle lenses 69 are arranged corresponding to two of the three LEDs, and one intermediate lens 67 is arranged corresponding to the remaining LED of the three LEDs and illuminates a subject at a medium distance. Each lens is provided in one-to-one correspondence with the LEDs. In other words, there are the same number of LEDs and lenses, three each.

[0019] 4 is a schematic diagram for explaining the arrangement of each lens in each pedestal. That is, in the camera unit main body 33, two wide-angle illumination units 59 are collected in the first LED pedestal 55 on the left side across the imaging lens 35, and two narrow-angle illumination units 63 are collected in the second LED pedestal 57 on the right side across the imaging lens 35. On the other hand, two mid-distance illumination units 61 are distributed such that one lamp is disposed in the first LED pedestal 55 on the left side across the imaging lens 35, and the other lamp is disposed in the second LED pedestal 57 on the right side across the imaging lens 35. Note that, as described later, the arrangement of the mid-distance illumination units 61 is not limited to this.

[0020] In the surveillance camera 11, the narrow-angle lens 69, which requires higher irradiation accuracy, is concentrated and arranged only on the second LED pedestal 57 on one side, so that strict optical axis adjustment is required only on the second LED pedestal 57 on one side. Also, the surveillance camera 11 is configured so that high component arrangement accuracy is required only on the second LED pedestal 57 on one side.

[0021] FIG. 5 is a schematic diagram showing a modified example of lens arrangement. In addition, the surveillance camera 11 can prioritize adjustment and component placement accuracy by moving the left and right intermediate lenses 67 to one side. That is, by consolidating only the two intermediate lenses 67 in the first LED pedestal 55, the second LED pedestal 57 can be configured to be specialized for narrow-angle adjustment and component placement accuracy. In addition, the first LED pedestal 55 can be configured to be specialized for wide-angle and medium-distance adjustment and component placement accuracy. The following two constraints determine whether the configuration of the first embodiment (FIG. 4) or the configuration of the modified example (FIG. 5) is adopted. The first constraint is the size constraint when mounted on the LED pedestal. The second constraint is the thermal constraint (i.e., ease of heat dissipation) to change the LED, which is the heat source, from a 3:3 configuration to a 2:4 configuration. That is, in the configuration of the first embodiment (see FIG. 4), size and heat dissipation performance are prioritized. On the other hand, in the configuration of the modified example (see FIG. 5), adjustment and component placement accuracy are prioritized.

[0022] FIG. 6 is a front view of the camera unit body 33 shown in FIG. 3. When viewed from the front, the camera unit body 33 faces downward in the imaging direction. As shown in FIG. 6, the camera unit body 33 has a first LED pedestal 55 and a second LED pedestal 57 that sandwich the camera unit body 33 from the left and right directions, and the arrangements of the first LED pedestal 55 and the second LED pedestal 57 are different in the vertical direction. As a result, the arrangements of the LEDs 71a (see FIG. 8A and FIG. 8B) provided on the first LED pedestal 55 and the LEDs 71b (see FIG. 8A and FIG. 8B) provided on the second LED pedestal 57 are different in the vertical direction. Specifically, the first LED pedestal 55 is located lower than the second LED pedestal 57. Therefore, the LEDs 71a (see FIG. 8A and FIG. 8B) provided on the first LED pedestal 55 are located lower than the LEDs 71b (see FIG. 8A and FIG. 8B) provided on the second LED pedestal 57.

[0023] FIG. 7 is a schematic diagram showing the difference between the left and right pedestal positions. The LED 71a provided on the first LED pedestal 55 and the LED 71b provided on the second LED pedestal 57 are mounted on the illumination board 73 (see FIG. 8A and FIG. 8B). The illumination board 73 is not shown in FIG. 7. The illumination board 73 provided on the first LED pedestal 55 is mounted with a wide-angle lens 65 with an optical axis 75 (see FIG. 8A and FIG. 8B) aligned with the LED 71a. Similarly, the illumination board 73 provided on the second LED pedestal 57 is mounted with a narrow-angle lens 69 with an optical axis 75 (see FIG. 8A and FIG. 8B) aligned with the LED 71b. The illumination board 73 is attached in close contact with the installation surface 77 (see FIG. 8A and FIG. 8B) of the pedestal in parallel. Therefore, the LEDs 71a and 71b provided on the pedestals located at different positions in the vertical direction are arranged differently in the vertical direction. By using different bases in the top and bottom directions, the left and right lens arrangements can be different, which increases the design freedom of the lens arrangement.

[0024] For example, as shown in FIG. 7, the wide-angle lens 65 can be arranged lower than the narrow-angle lens 69, making it easier to increase the irradiation angle. The vertical positions of the wide-angle lens 65 and the narrow-angle lens 69 are not limited to this. The wide-angle lens 65 may be arranged higher than the narrow-angle lens 69 as long as no vignetting occurs. In the first embodiment, as shown in FIG. 6, the position of the apex V of the narrow-angle lens 69 is closer to the subject than that of the wide-angle lens 65. This allows the apex of the wide-angle lens 65 to be arranged higher than the apex of the narrow-angle lens 69, which contributes to making the overall structure more compact.

[0025] The narrow-angle lens 69 has optical characteristics with a longer back focal length than the wide-angle lens 65, and is required to irradiate the required irradiation power over a long distance. For this reason, the apex V of the narrow-angle lens 69 is higher (longer) from the installation surface 77, and tends to be larger in diameter. That is, the brightness (Fno) of the narrow-angle lens 69 is expressed as (Fno)=f(focal length) / fai. That is, when a lens is used for a long distance, f becomes longer and the required pupil diameter becomes larger. For this reason, in the distance relationship between the lens and the LED, the distance between the narrow-angle lens 69 and the LED 71b is set longer than the distance between the wide-angle lens 65 and the LED 71a. In the surveillance camera 11, by arranging the installation surface 77 of the narrow-angle lens 69 and the LED 71b on the upper side, the narrow-angle lens 69 does not protrude forward, and interference with the dome cover 25 is less likely to occur. It also contributes to minimizing (compacting) the overall structure.

[0026] 8A is a cross-sectional view taken along line AA in FIG. 3. The main shaft 53 of the camera unit body 33 is formed by a narrow-angle side metal fitting 79 on which the second LED seat 57 is formed. The lower end side of the narrow-angle side metal fitting 79 is bent to project to the right at a substantially right angle to a reference surface 81 (see below) to form the second LED seat 57. The camera unit body 43 is provided with a reference surface 81 that is parallel to the lens central axis 39 and at a constant distance. The narrow-angle side metal fitting 79 on which the main shaft 53 is formed abuts against this reference surface 81. The reference surface 81 and the surface of the narrow-angle side metal fitting 79 that abuts against the reference surface 81 are fixed together using a fastening member such as a screw.

[0027] On the other hand, the driven shaft 51 of the camera section main body 33 is formed in the wide-angle side metal fitting 83 on which the first LED pedestal 55 is formed. The lower end side of the wide-angle side metal fitting 83 is bent so as to protrude leftward at a substantially right angle to a subordinate surface 85 (see below) to form the first LED pedestal 55. The subordinate surface 85 is provided on the camera unit main body 43. The wide-angle side metal fitting 83 on which the driven shaft 51 is formed is indirectly fixed to this subordinate surface 85 via an intermediate member (subordinate part). In the first embodiment, the intermediate member is, for example, the narrow-angle side metal fitting 79 and a rubber washer described later.

[0028] Fig. 9 is a perspective view of the camera unit body 43 with the wide-angle side metal fitting 83 and the narrow-angle side metal fitting 79 attached, as seen from the front side. Fig. 10 is a perspective view of the camera unit body 43 with the wide-angle side metal fitting 83 and the narrow-angle side metal fitting 79 attached, as seen from the rear side. Fig. 11 is a side view of the camera unit body 43 with the narrow-angle side metal fitting 79 attached, as seen from the right side. Fig. 12 is a perspective view of the right side of the narrow-angle side metal fitting 79, as seen diagonally from the rear. Fig. 13 is a perspective view of the front of the narrow-angle side metal fitting 79, as seen diagonally from below and in front.

[0029] The front side of the wide-angle side metal fitting 83 is fixed with screws 87 to the narrow-angle side metal fitting 79 fixed to the camera unit body 43. The rear side of the wide-angle side metal fitting 83 is fixed with two screws 87 at the top and bottom to the narrow-angle side metal fitting 79 fixed to the camera unit body 43. The right side of the narrow-angle side metal fitting 79 is fixed to the camera unit body 43 with screws 87 at one bottom and one top.

[0030] The narrow-angle-side bracket 79 has female threads 89 formed at two locations, one above and one below, into which screws 87 for fixing the wide-angle-side bracket 83 shown in Fig. 10 at two locations, one above and one below. The narrow-angle-side bracket 79 has female threads 89 formed in a boss portion 91 into which screws 87 for fixing the wide-angle-side bracket 83 shown in Fig. 9 at the upper side in the vertical direction are screwed.

[0031] Fig. 14 is an enlarged view of part B shown in Fig. 11, seen from a perspective shifted downward. Fig. 15 is a cross-sectional view taken along CC in Fig. 14. The second LED base 57 fixed to the narrow-angle side metal fitting 79 is provided with a semi-cylindrical wall portion 93 for fastening the screw 87 to the camera unit body 43 in the left direction. Before the illumination board 73 is attached, the screw 87 penetrates the narrow-angle side metal fitting 79 in the left direction and is fastened to the camera unit body 43 in this semi-cylindrical wall portion 93.

[0032] The screw 87 inserted into the through hole 95 in the left direction from the semi-cylindrical wall portion 93 shown in Fig. 14 penetrates the narrow-angle side metal fitting 79 at the base end vicinity portion 97 from which the second LED base 57 extends, and is fastened to the camera unit body 43. As a result, the base end vicinity portion 97 of the narrow-angle side metal fitting 79 abuts against the reference surface 81 of the camera unit body 43 and is fixed. Note that the base end vicinity portion 97 has a positioning hole 101 drilled therein, into which a positioning pin 99 protruding from the reference surface 81 fits. The base end vicinity portion 97 is positioned in the YZ directions with respect to the reference surface 81 of the camera unit body 43 by fitting the positioning pin 99 into the positioning hole 101.

[0033] Figure 16 is a DD cross-sectional view of Figure 11. The narrow-angle-side bracket 79 has a through-hole 95 drilled in the lower right side plate 103. A positioning hole 101 is drilled near the through-hole 95. A screw 87 inserted into the through-hole 95 in the lower right side plate 103 passes through the narrow-angle-side bracket 79 and is fastened to the camera unit body 43. As a result, the lower right side plate 103 of the narrow-angle-side bracket 79 abuts against the reference surface 81 of the camera unit body 43 and is fixed. The positioning pin 99 fits into the positioning hole 101, so that the lower right side plate 103 is positioned in the YZ directions with respect to the reference surface 81 of the camera unit body 43.

[0034] Figure 17 is an E-E cross-sectional view of Figure 11. The narrow-angle-side bracket 79 has a through-hole 95 drilled in an upper right side plate 105. A positioning hole 101 is drilled near the through-hole 95. A screw 87 inserted into the through-hole 95 in the upper right side plate 105 passes through the narrow-angle-side bracket 79 and is fastened to the camera unit body 43. As a result, the upper right side plate 105 of the narrow-angle-side bracket 79 abuts against and is fixed to the reference surface 81 of the camera unit body 43. The right side plate upper part 105 is positioned in the YZ directions with respect to the reference surface 81 of the camera unit body 43 by fitting the positioning pin 99 into the positioning hole 101.

[0035] Fig. 18 is a side view of the camera unit body 43 with the wide-angle side metal fitting 83 attached, seen from the left side. Fig. 19 is a perspective view of the left side of the wide-angle side metal fitting 83, seen diagonally from the rear. Fig. 20 is a perspective view of the front of the wide-angle side metal fitting 83, seen diagonally from below and in front. Fig. 21 is a cross-sectional view taken along line GG shown in Fig. 18.

[0036] The wide-angle side metal fitting 83 has its left side fixed to the camera unit body 43 at one lower location and one upper location with stepped screws 107. An upper fixing piece 109 and a lower fixing piece 111 protrude rearward from the wide-angle side metal fitting 83 for fixing the narrow-angle side metal fitting 79 shown in FIG. 10 at two upper and lower locations. Each of the upper fixing piece 109 and the lower fixing piece 111 has a through hole 95 and a positioning hole 101 drilled therein. The upper fixing piece 109 is fixed to an upper fixed piece 113 of the narrow-angle side metal fitting 79 shown in FIG. 13. The lower fixing piece 111 is fixed to a lower fixed piece 115 of the narrow-angle side metal fitting 79 shown in FIG. 13. A screw 87 is inserted through the through holes 95 drilled in the upper fixing piece 109 and the lower fixing piece 111. Positioning pins 99 protruding from an upper fixed piece 113 and a lower fixed piece 115 are fitted into positioning holes 101 formed in the upper fixed piece 109 and the lower fixed piece 111, respectively.

[0037] The wide-angle-side bracket 83 is formed with a fixing leg 117 which is fixed to the boss 91 of the narrow-angle-side bracket 79 shown in Fig. 9. A through hole 95 into which a screw 87 is inserted is drilled in the fixing leg 117. The fixing leg 117 is fixed to the narrow-angle-side bracket 79 by fastening the screw 87 inserted into the through hole 95 to the boss 91 (see Fig. 9).

[0038] The wide-angle side fitting 83 is shown in the FF cross section of the stepped screw 107 shown in FIG. 18 at the position of the stepped screw 107 shown in FIG. 16. As shown in FIG. 16, the stepped screw 107 has a step between the small-diameter male thread portion 119 at the tip side and the large-diameter neck portion 121 continuing to the head. A rubber washer 123 is attached to the through hole 95 into which the stepped screw 107 is inserted. The rubber washer 123 is formed in a cylindrical shape having an inner hole 125, and a circumferential groove 129 into which the inner diameter portion 127 of the through hole 95 is fitted is formed on the outer circumferential surface. The rubber washer 123 is attached to the through hole 95 by fitting the circumferential groove 129 into the inner diameter portion 127 of the through hole 95. The neck portion 121 of the stepped screw 107 inserted into the inner hole 125 passes through the rubber washer 123 attached to the through hole 95. When the male thread portion 119 of the shoulder screw 107 passing through the inner hole 125 is fastened to the subordinate surface 85 of the camera unit body 43, the inner diameter portion 127 of the through hole 95 is sandwiched by the rubber washer 123, so that a gap S is formed between the camera unit body 43 and the wide-angle side metal fitting 83. In other words, the wide-angle side metal fitting 83 is fixed with a gap between it and the subordinate surface 85 of the camera unit body 43.

[0039] As in the FF cross section, in the GG cross section, the stepped screw 107 is inserted into the inner hole 125 of the rubber washer 123 whose circumferential groove 129 is fitted into the inner diameter portion 127 of the through hole 95, and is fastened to the subordinate surface 85 of the camera unit body 43. Therefore, as in the above, the wide-angle side metal fitting 83 has the inner diameter portion 127 of the through hole 95 sandwiched between the rubber washer 123, so that a gap S is formed between the camera unit body 43 and the wide-angle side metal fitting 83. In other words, the wide-angle side metal fitting 83 is fixed with a gap between it and the subordinate surface 85 of the camera unit body 43.

[0040] In this way, by having a gap between the camera unit body 43 and the dependent surface 85, it is possible to prevent the camera unit body 43 from being attracted to the dependent surface 85 when the camera unit body 43 or the dependent surface 85 expands due to, for example, a rise in temperature. This attracts the camera unit body 43 to the dependent surface 85, preventing the position of the imaging lens 35 arranged inside the camera unit body 43 from changing, and preventing changes in the distance and inclination of the narrow-angle lens 69 relative to the lens central axis 39.

[0041] Also, a light-shielding sheet may be disposed between the LED 71b and the imaging lens 35. More specifically, referring to FIG. 8B, the light-shielding sheet 80a may be disposed on the surface of the narrow-angle side metal fitting 79 that is lower than the second LED pedestal 57 along the side of the front cover 47. The mounting position of the light-shielding sheet 80a is not limited to the above-mentioned position, and may be disposed between the LED 71b and the imaging lens 35. Alternatively, the light-shielding sheet 80b may be disposed along, for example, the surface of the narrow-angle lens 69 that faces the narrow-angle side metal fitting 79 and the side of the front cover 47, or along the inner peripheral surface of the narrow-angle lens 69. This can prevent light leaking between the LED 71b and the narrow-angle lens 69 from entering the imaging lens 35, and deterioration of the image quality of the image captured by the surveillance camera 11 is suppressed.

[0042] FIG. 25 is a schematic diagram showing a further modified example of the lens arrangement. Specifically, in the example of FIG. 25, a pedestal on which the narrow-angle lens 69 and the intermediate lens 67 are integrated is arranged on the left side, and a pedestal on which the wide-angle lens 65 and the intermediate lens 67 are integrated is arranged on the front side. That is, the first LED pedestal 55 and the second LED pedestal 57 do not have to be provided symmetrically on the left and right sides of the camera unit body 33. It should be noted that, without being limited to the example shown in FIG. 25, the first LED pedestal 55 and the second LED pedestal 57 may be arranged on the left side and the rear side, or on the front side and the rear side, the right side and the lower side, or the right side and the front side. This improves the degree of freedom in arranging the first LED pedestal 55 and the second LED pedestal 57 according to the size of the space inside the housing of the surveillance camera 11.

[0043] Next, the operation of the above-mentioned configuration will be described.

[0044] The surveillance camera 11 according to the first embodiment includes a first infrared irradiating unit that irradiates a first infrared light (infrared light that transmits through the wide-angle lens 65 in FIG. 7), a second infrared irradiating unit that irradiates a second infrared light (infrared light that transmits through the narrow-angle lens 69 in FIG. 7) having an irradiation angle narrower than that of the first infrared light, an imaging lens 35 into which light from at least one irradiation area of ​​the first infrared light and the second infrared light is incident, and includes a camera unit body 33 and a dome cover 25 that covers the camera unit body 33. The direction along the lens central axis 39 of the imaging lens 35 is defined as the up-down direction, the direction along the tilt axis 37 is defined as the left-right direction, and the direction perpendicular to the lens central axis 39 and the tilt axis 37 is defined as the front-rear direction. The first infrared irradiating unit includes at least a first light source (LED 71a) and a first base (first LED base 55) on which the first light source (LED 71a) of the first infrared light is placed. The second infrared irradiation unit has at least a second light source (LED 71b) and a second base (second LED base 57) on which the second light source (LED 71b) of the second infrared light is placed. The first base (first LED base 55) and the second base (second LED base 57) provided adjacent to the side of the camera unit main body 33 are arranged differently in the vertical direction. The first light source (LED 71a) and the second light source (LED 71b) may be arranged differently in the vertical direction. The surveillance camera 11 is not limited to a so-called PTZ camera, and may be a fixed camera that does not rotate by panning or tilting.

[0045] In the surveillance camera 11, the first light source (LED 71a) and the second light source (LED 71b) may be provided so as to sandwich the camera unit body 33 from the left and right directions.

[0046] In the surveillance camera 11 according to the first embodiment, the first LED pedestal 55 and the second LED pedestal 57 are provided so as to sandwich the camera unit body 33 from the left and right direction. The camera unit body 33 has an imaging lens 35. That is, the first LED pedestal 55 and the second LED pedestal 57 are arranged to sandwich the lens central axis 39 of the camera unit body 33. A plurality of identical LEDs (e.g., LEDs 71a and 71b) are arranged on each of the first LED pedestal 55 and the second LED pedestal 57.

[0047] Both LEDs 71a and 71b have the same light emission intensity. LEDs 71a and 71b form an illumination unit by providing an emission lens between them and the subject. Therefore, wide-angle illumination unit 59 (first infrared irradiation unit) equipped with wide-angle lens 65 having a wide emission angle has low emission intensity and a short irradiation distance. On the other hand, narrow-angle illumination unit 63 (second infrared irradiation unit) equipped with narrow-angle lens 69 having a narrow emission angle has high emission intensity and a long irradiation distance.

[0048] 22 is a schematic diagram showing a configuration according to Comparative Example 1 in which a wide-angle lens 65 and a narrow-angle lens 69 are symmetrically arranged on the left and right LED pedestals, as viewed from the front. In FIG. 22, a pair of the wide-angle lens 65 and the narrow-angle lens 69 is arranged on each of the left and right LED pedestals. That is, the pair of the wide-angle lens 65 and the narrow-angle lens 69 is arranged symmetrically on the left and right sides at the same height in the vertical direction, centered on the camera unit body 43. In the configuration according to Comparative Example 1 in FIG. 22, illumination by the wide-angle lens 65 with a short back focus length enters a part of the narrow-angle lens 69 with a long back focus length, which may cause vignetting in the image captured by the camera unit body 43.

[0049] 23 is a schematic diagram showing a configuration according to Comparative Example 2, in which a wide-angle lens 65, a narrow-angle lens 69, and an intermediate lens 67 are symmetrically arranged on the left and right LED pedestals, as viewed from below. In the configuration according to Comparative Example 2, it is necessary for each of the left and right LED pedestals to have several types of lenses (specifically, three types) with different back focal lengths. This makes it difficult to align each irradiation direction with respect to the imaging lens 35. In other words, it takes time and effort to adjust the optical axis. In addition, there is a problem that the number of lead wires increases because the LEDs need to be adjusted separately for the left and right.

[0050] 24 is a schematic diagram of a configuration according to Comparative Example 3 in which a wide-angle lens 65, a narrow-angle lens 69, and an intermediate lens 67 are symmetrically arranged on one LED pedestal, as viewed from below. In the configuration according to Comparative Example 3 in which there is one pedestal, the pedestal must be arranged in the front-to-rear direction relative to the imaging lens 35, which creates a problem that the outer diameter of the camera becomes large when a tilt rotation mechanism is taken into consideration. In addition, the pedestal becomes enlarged relative to the imaging lens 35, which causes a loss of balance in terms of design.

[0051] In contrast, in the surveillance camera 11, as shown in FIG. 7, the arrangement of the first LED pedestal 55 and the second LED pedestal 57 differs in the vertical direction. The vertical direction here refers to the direction along the lens central axis 39. Therefore, the distance between the subject and the LEDs 71a, 71b arranged on the first LED pedestal 55 and the second LED pedestal 57, respectively, is different. That is, either the left or right LED 71a or LED 71b is raised (i.e., recedes to a position farther away from the subject). This increases the freedom of lens arrangement in the surveillance camera 11, and improves the design freedom for making the entire structure compact and suppressing vignetting.

[0052] For example, the narrow-angle illumination unit 63 having a narrow-angle lens 69 with high output intensity and long illumination distance has a longer back focus length (BF) and a larger required pupil diameter than the wide-angle illumination unit 59, as shown in Fig. 7. For this reason, when the wide-angle illumination unit 59 and the narrow-angle illumination unit 63 are installed on the same mounting plane as shown in Fig. 22, the narrow-angle lens 69 of the narrow-angle illumination unit 63 protrudes significantly toward the subject side, causing vignetting.

[0053] In contrast, in the surveillance camera 11, the first LED pedestal 55 and the second LED pedestal 57 are arranged differently in the vertical direction, so that the left and right lenses can be arranged separately, and the degree of freedom in lens arrangement can be increased. For example, it is possible to select to arrange the narrow-angle illumination unit 63 equipped with the narrow-angle lens 69 that protrudes significantly toward the subject side on the upper pedestal (the side farther from the subject). Also, the wide-angle illumination unit 59 can be arranged on the lower side (the side closer to the subject), making it easier to increase the irradiation angle. As a result, the narrow-angle lens 69 that protrudes significantly toward the subject side makes it difficult for the wide-angle illumination emitted from the wide-angle lens 65 of the wide-angle illumination unit 59 to be vignetted (i.e., the degree of design freedom is improved).

[0054] Furthermore, since the narrow-angle illumination unit 63 equipped with the narrow-angle lens 69 has a long illumination distance, care must be taken to overlap the illumination areas when multiple narrow-angle illumination units 63 are provided. In the configuration according to Comparative Example 1 shown in Fig. 22 in which the wide-angle lens 65 and the narrow-angle lens 69 are symmetrically arranged on the left and right LED pedestals, optical axis adjustment is required for the two narrow-angle lenses 69 spaced apart across the camera unit body 43, so the required part precision becomes stricter for each pedestal, resulting in increased costs.

[0055] In contrast, in the surveillance camera 11, the narrow-angle illumination parts 63 with a long back focal length (BF) shown in FIG. 7 are concentrated on the upper pedestal (the side farther from the subject) of the first LED pedestal 55 and the second LED pedestal 57, which are located at different positions in the upper and lower directions, and are arranged as shown in FIG. 4, so that it is only necessary to ensure the required part accuracy of the pedestal on one side (the right side). In other words, it is possible to reduce the number of parts with high required part accuracy while suppressing vignetting, and to reduce manufacturing costs. In addition, since it is possible to concentrate and arrange the narrow-angle illumination parts 63 with a long back focal length on the upper pedestal, the lens central axes 39 of the narrow-angle illumination parts can be brought close to each other, making it easy to overlap the illumination, that is, to narrow the illumination angle. As a result, in the surveillance camera 11, the narrow-angle lens 69, which requires higher accuracy, is concentrated on either the first LED pedestal 55 or the second LED pedestal 57, so that strict optical axis adjustment is performed only on one side, and high required part accuracy is also performed only on one side.

[0056] Moreover, the first light source (LED 71a) is disposed closer to the dome cover 25 than the second light source (LED 71b).

[0057] In this surveillance camera 11, the first light source (LED 71a) is disposed closer to the dome cover 25 than the second light source (LED 71b). The distance between the narrow-angle lens 69 and the LED 71b is set longer than the distance between the wide-angle lens 65 and the LED 71a. Therefore, by disposing the LED 71a closer to the dome cover 25 than the LED 71b, the narrow-angle lens 69 does not protrude forward and is less likely to interfere with the dome cover 25.

[0058] Furthermore, in the surveillance camera 11, a wide-angle lens 65 that emits light from the first light source (LED 71a) at a wide angle is disposed on the first pedestal (first LED pedestal 55). A narrow-angle lens 69 that emits light from the second light source (LED 71b) at a narrower angle than the wide-angle lens 65 is disposed on the second pedestal (second LED pedestal 57) that is closer to the dome cover 25 than the first pedestal (first LED pedestal 55).

[0059] In this surveillance camera 11, a wide-angle lens 65 is disposed on the first LED pedestal 55 on the lower side (closer to the subject), and a narrow-angle lens 69 is disposed on the second LED pedestal 57 located above the first LED pedestal 55 (farther from the subject). This allows the surveillance camera 11 to freely design the emission intensity and irradiation angle according to the target specifications by using different illumination lenses. The narrow-angle lens 69 needs to irradiate the required emission intensity over a long distance. For this reason, the apex V of the lens tends to be higher than the installation surface 77, and the lens tends to have a large aperture.

[0060] In the surveillance camera 11, by arranging the lens installation surface on the narrow-angle lens side (i.e., the second LED pedestal 57) on the upper side (the side farther from the subject), the narrow-angle lens 69 does not protrude forward, which also contributes to miniaturization of the overall structure. Also, since the wide-angle lens 65 and the narrow-angle lens 69 can be arranged separately on the first LED pedestal 55 and the second LED pedestal 57, it is possible to arrange them in a way that makes it easy to bring out their individual characteristics, and it is also easy to consider vignetting between the lenses.

[0061] Furthermore, in the surveillance camera 11, the distance between the wide-angle lens 65 and the first light source (LED 71a) is shorter than the distance between the narrow-angle lens 69 and the second light source (LED 71b).

[0062] In this surveillance camera 11, the distance between the narrow-angle lens 69 and the LED 71b, i.e., the back focus length, is set longer than the distance between the wide-angle lens 65 and the LED 71a, i.e., the back focus length. In the surveillance camera 11, the lens installation surface on the narrow-angle lens side is arranged on the upper side as described above, so that even if the back focus length of the narrow-angle lens 69 is set longer, the forward projection of the narrow-angle lens 69 can be suppressed. This makes it possible to set the emission intensity of the narrow-angle illumination unit 63 equipped with the narrow-angle lens 69 higher than that of the wide-angle illumination unit 59 while employing LEDs 71a and 71b having the same emission intensity. As a result, compared to a case in which an illumination unit is constructed using LEDs with different specifications and illumination lenses with different specifications, the illumination unit can be constructed using LEDs 71a and 71b with the same specifications, so that multiple parts can be standardized and shared, and the product cost can be reduced.

[0063] Furthermore, in the surveillance camera 11, the apex position of the narrow-angle lens 69 is closer to the subject in the irradiation area of ​​at least one of the first infrared light and the second infrared light than the apex position of the wide-angle lens 65.

[0064] In this surveillance camera 11, the apex position of the narrow-angle lens 69 is closer to the subject than the apex position of the wide-angle lens 65, that is, it is arranged on the lower side (the side closer to the subject). In other words, the apex position of the narrow-angle lens 69 is arranged closer to the dome cover 25 than the apex position of the wide-angle lens 65. In the surveillance camera 11, the camera unit main body 33 and the two pedestals that sandwich the camera unit main body 33 are covered by the same dome cover 25. The central imaging lens 35 is covered by the imaging window portion 27 that is a part of the dome cover 25. The first LED pedestal 55 and the second LED pedestal 57 on both the left and right sides that sandwich the camera unit main body 33 are covered by the two light projection window portions 29 that are both side portions of the imaging window portion 27.

[0065] Here, the narrow-angle illumination section 63 equipped with the narrow-angle lens 69 is disposed on the second LED pedestal 57 above (further from the subject) than the wide-angle illumination section 59 equipped with the wide-angle lens 65. The narrow-angle illumination section 63 has a long back focus length and therefore requires a larger accommodation space in the vertical direction than the wide-angle illumination section 59. For this reason, the narrow-angle illumination section 63 is disposed so that the narrow-angle lens 69 is as close as possible to the light projection window section 29 (limit design). This makes it possible to determine the position of the second LED pedestal 57.

[0066] On the other hand, the wide-angle illumination section 59, which has a shorter back focal length than the narrow-angle illumination section 63, can be accommodated in a smaller accommodation space than the narrow-angle illumination section 63. Therefore, the first LED base 55 on which the wide-angle illumination section 59 is provided can be arranged lower (closer to the subject) than the second LED base 57. By arranging the wide-angle lens 65 at a position that does not protrude forward of the narrow-angle lens 69 and at a vertical position where vignetting does not occur, vignetting can be prevented without compromising the compactness of the entire device. In other words, the wide-angle lens 65 can be installed at any vertical position as long as it does not protrude forward of the narrow-angle lens 69 and does not cause vignetting.

[0067] In addition, in the surveillance camera 11, three light sources are arranged on the first pedestal (first LED pedestal 55), and three light sources are arranged on the second pedestal (second LED pedestal 57). On the first pedestal (first LED pedestal 55), two first light sources (LEDs 71a) of the three light sources and two wide-angle lenses 65 corresponding to the first light sources, and one remaining light source (LED) of the three light sources and one intermediate lens 67 corresponding to the remaining light source for illuminating a subject at a medium distance. On the second pedestal (second LED pedestal 57), two second light sources (LEDs 71b) of the three light sources and two narrow-angle lenses 69 corresponding to the second light sources, and one remaining light source (LED) of the three light sources and one intermediate lens 67 corresponding to the remaining light source for illuminating a subject at a medium distance for illuminating a subject at a medium distance.

[0068] In this surveillance camera 11, the illumination lens has three types of lenses: a wide-angle lens 65, an intermediate lens 67, and a narrow-angle lens 69. That is, it is possible to project illumination at a wide angle for a short distance, an intermediate distance, and a narrow angle for a long distance.

[0069] In this surveillance camera 11, even if there are two or more target specifications, there is no need to select LEDs 71 separately to match the targets. This has the advantage of making it possible to reduce product costs by arranging performance adjustment lenses (i.e., wide-angle lens 65, intermediate lens 67, narrow-angle lens 69) for one type of LED 71 according to the specifications.

[0070] In addition, the wide-angle lens 65 is concentrated on one side, and the narrow-angle lens 69 is concentrated on the other side. Therefore, by consolidating the lenses on each side, adjustments are easier and the number of parts that require precision can be reduced. Furthermore, by dividing the intermediate lens 67 into left and right, it is possible to prevent the LED base on one side from becoming enlarged and to avoid thermal constraints on one side. In other words, the exhaust heat of the LED 71 can be evenly distributed to the left and right LED bases.

[0071] Moreover, the surveillance camera 11 further includes a narrow-angle side metal fitting 79 that forms a second seat (second LED seat 57) on one end side and abuts and fixes the second seat (second LED seat 57) to the camera unit body 33.

[0072] In this surveillance camera 11, narrow-angle side metal fitting 79, which forms second LED seat 57 at one end, is directly fixed to camera body 33. Camera body 33 is supported rotatably relative to camera housing 21 around the tilt axis. Tilt axis 37 is made up of main shaft 53 protruding from the right side surface of camera body 33, and driven shaft 51 protruding coaxially with main shaft 53 from the left side surface of camera body 33.

[0073] The main shaft 53 is formed on a narrow-angle side metal fitting 79 on which the second LED pedestal 57 is formed. The narrow-angle side metal fitting 79 is directly fixed to the camera unit main body 33 using a fastening member such as a screw 87. The camera unit main body 33 is provided with a reference surface 81 whose position with respect to the lens central axis 39 is determined with high precision. By fixing the narrow-angle side metal fitting 79 to this reference surface 81, the second LED pedestal 57 can be positioned with high precision with respect to the lens central axis 39.

[0074] As a result, the narrow-angle illumination section 63 (i.e., the LED 71 and narrow-angle lens 69) attached to the second LED base 57 formed on the narrow-angle side metal fitting 79 can be positioned with high precision relative to the lens central axis 39 and attached.

[0075] In addition, the surveillance camera 11 further includes a wide-angle side bracket 83 that forms a first base (first LED base 55) at one end and fixes the first base (first LED base 55) to the camera unit body 33 with an intermediate member (rubber washer 123) interposed therebetween.

[0076] In this surveillance camera 11, the wide-angle side metal fitting 83, which forms the first LED base 55 at one end, is indirectly fixed to the camera unit body 33 via an intermediate member. A driven shaft 51 is formed in the wide-angle side metal fitting 83. The wide-angle side metal fitting 83 is positioned via a subordinate surface 85 of the camera unit body 33. The positioned wide-angle side metal fitting 83 is fixed to the camera unit body 33 via the intermediate member (subordinate part).

[0077] The subordinate parts are, for example, the narrow-angle side metal fitting 79 and a rubber washer 123. The wide-angle side metal fitting 83 is indirectly fixed to the camera unit body 43 by using a fastening member such as a screw 87 between the subordinate surface 85 of the camera body 33 and the narrow-angle side metal fitting 79. The wide-angle side metal fitting 83 is fixed to the subordinate surface 85 of the camera body 33 via a rubber washer 123. The driven shaft 51 is slightly misaligned due to an accumulated tolerance or the like that occurs between the driven shaft 51 and the main shaft 53. The rubber washer 123 absorbs this misalignment, and the driven shaft 51 is supported by the subordinate surface 85 so as to perform smooth tilt rotation. In other words, the wide-angle side metal fitting 83 has a floating structure.

[0078] The wide-angle side metal fitting 83 having a floating structure is formed with the first LED seat 55. The wide-angle lens 65 and the intermediate lens 67, which have a relatively loose positional accuracy with respect to the projection target compared to the narrow-angle lens 69, are attached to the first LED seat 55.

[0079] This allows the wide-angle illumination unit 59 and the mid-distance illumination unit 61 to be attached to the first LED base 55 with less precision than the narrow-angle illumination unit 63 with respect to the lens central axis 39. As a result, in the surveillance camera 11, high component precision is required only on one side of the LED base, and manufacturing costs can be reduced.

[0080] Although various embodiments have been described above with reference to the accompanying drawings, the present disclosure is not limited to such examples. It is clear that a person skilled in the art can conceive of various modifications, corrections, substitutions, additions, deletions, and equivalents within the scope of the claims, and it is understood that these also belong to the technical scope of the present disclosure. In addition, the components in the various embodiments described above may be arbitrarily combined within the scope of the invention. [Industrial Applicability]

[0081] INDUSTRIAL APPLICABILITY The present disclosure is useful as a surveillance camera that can suppress the occurrence of vignetting, reduce the number of components that require precise placement, and facilitate narrowing the angle of illumination light. [Explanation of symbols]

[0082] 11. Surveillance Cameras 33 Camera unit body 35 Imaging lens 37 Tilt axis 39 Lens central axis 55 1st LED pedestal 57 2nd LED pedestal 65 Wide-angle lens 67 Intermediate Lens 69 Narrow-angle lens 71a Wide-angle LED 71b Narrow angle LED 71c Intermediate LED 79 Narrow angle side bracket (intermediate part) 83 Wide-angle side bracket 123 Rubber washer (intermediate part)

Claims

1. A first infrared irradiating unit that irradiates the first infrared light; a second infrared irradiation unit that irradiates a second infrared light having an irradiation angle narrower than that of the first infrared light; a camera unit body having an imaging lens into which light from an irradiation area of ​​at least one of the first infrared light and the second infrared light is incident, and a dome cover covering the camera unit body; the first infrared irradiation unit includes a first light source of the first infrared light and a first base on which the first light source is placed, The second infrared irradiation unit has a second light source of the second infrared light and a second base on which the second light source is placed, The first light source and the second light source provided adjacent to a side surface of the camera unit body are arranged differently in the up-down direction. Surveillance camera.

2. The first base and the second base are arranged differently in the vertical direction. The surveillance camera according to claim 1 .

3. The first light source is disposed closer to the dome cover than the second light source. The surveillance camera according to claim 1 .

4. a wide-angle lens that emits light from the first light source at a wide angle is disposed on the first base; a narrow-angle lens that emits light from the second light source at a narrower angle than the wide-angle lens is disposed on the second base that is closer to the dome cover than the first base; The surveillance camera according to claim 2.

5. a distance between the wide-angle lens and the first light source is shorter than a distance between the narrow-angle lens and the second light source; The surveillance camera according to claim 4.

6. The apex position of the narrow-angle lens is closer to the dome cover than the apex position of the wide-angle lens. The surveillance camera according to claim 4.

7. Three light sources are arranged on the first base, and three light sources are arranged on the second base, On the first base, two of the three light sources, two of the first light sources, two of the wide-angle lenses corresponding to the first light sources, and one of the remaining light sources, one of the three light sources, and one intermediate lens corresponding to the remaining light source are arranged; On the second base, two of the three light sources, two of the second light sources, two of the narrow-angle lenses corresponding to the second light sources, and one of the remaining light sources, one of the three light sources, and one intermediate lens corresponding to the remaining light source are arranged. The surveillance camera according to claim 4.

8. The camera further includes a narrow-angle side fitting that forms the second seat at one end and abuts and fixes the second seat to the camera unit body. The surveillance camera according to claim 7.

9. a wide-angle side metal fitting that forms the first seat at one end side and fixes the first seat to the camera unit body via an intermediate member, The surveillance camera according to claim 8.

10. The first light source and the second light source are provided so as to sandwich the camera unit body from the left and right direction. The surveillance camera according to claim 1 .

Images